The problem that presents itself now is the cheetah who specializes in speed, his muscles has focused on this goal. That's why the dams are often stolen by other predators such as lions, hyenas, leopards even African dogs. Well, there was an ancestor who lived in the Quaternary, the Pleistocene (over 1 million years) and with a size twice as large as the current cheetah, reaching weigh over 120 kg (264 lbs)and over 2 meters long excluding the tail(6 feet 3 inches). High BMI, used more nails (in comparison with modern cheetahs), suggesting that it was less suited to high speed, although it is believed that he could reach over 70 mph(lower than the current but faster than everyone else cats. We must remember that current Cheetahs reach speeds of 115 km / h.But this theory suggested by the great weight is offset by the antithesis: you think you might be even more than the current cheetah because its legs were of a larger size.Because of its bulk, it needs to go very fast after prey. Deer, mountain goats, moose and sambar (deer species) were their prey.It is thought that went extinct 10,000 years ago.